void main() {
  print("11");
  var d = 10;
  print('11 $d');
  print("""fdsafdsfds $d""");
  print('''$d''');
  print('''${1 + 1}''');
  print("444 " * 3);

  StringBuffer stringBuffer = new StringBuffer();
  stringBuffer.write("111");
  stringBuffer.write("111");
  stringBuffer.write("111");
  print(stringBuffer.toString());

  print("11" == "11");
  print("11" == "11");
  String s;
//  print(s.isEmpty);
  print("".isEmpty);
  print("1121121121".split("2"));
}
